CN110822429A - Adjustable circulation injection type low-nitrogen combustor - Google Patents
Adjustable circulation injection type low-nitrogen combustor Download PDFInfo
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- CN110822429A CN110822429A CN201911262747.3A CN201911262747A CN110822429A CN 110822429 A CN110822429 A CN 110822429A CN 201911262747 A CN201911262747 A CN 201911262747A CN 110822429 A CN110822429 A CN 110822429A
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- pipe
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- flue gas
- injection holes
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- 238000002347 injection Methods 0.000 title claims abstract description 67
- 239000007924 injection Substances 0.000 title claims abstract description 67
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims abstract description 62
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000003546 flue gas Substances 0.000 claims abstract description 60
- 239000007789 gas Substances 0.000 claims abstract description 28
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 40
- 239000000779 smoke Substances 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000000809 air pollutant Substances 0.000 description 2
- 231100001243 air pollutant Toxicity 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2202/00—Fluegas recirculation
- F23C2202/30—Premixing fluegas with combustion air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
The invention relates to the field of flue gas recirculation combustors, in particular to an adjustable circulating injection type low-nitrogen combustor. The gas pipe is communicated with the right end of the combustion chamber, and an air inlet is formed in the left end of the combustion chamber; the air pipe comprises an inner pipe and an outer pipe, the right end heads of the inner pipe and the outer pipe are communicated, and the inner pipe is communicated with the combustion chamber through an air inlet; the left end of the flue gas pipe is provided with a buffer ring which is vertical to the flue gas pipe; the outer tube is provided with a section of necking which is positioned in the buffer ring, the necking is provided with at least two injection holes, and the buffer ring injects smoke into the outer tube through the injection holes. According to the invention, air and flue gas are mixed, so that the air temperature is raised, the oxygen concentration is reduced, the combustion time in the combustion chamber can be prolonged, the temperature uniformity in the combustion chamber is greatly improved, the local high-temperature area is reduced, and the generation of nitrogen oxides is inhibited.
Description
Technical Field
The invention relates to the field of flue gas recirculation combustors, in particular to an adjustable circulating injection type low-nitrogen combustor.
Background
The policy of energy conservation, emission reduction and low carbon economy is greatly promoted in ChinaIn the background, natural gas is a clean energy source, and compared with coal, combustion products are almost free of dust and SO2. The main pollutants are nitrogen oxides which are harmful to human health and generate photochemical smog with hydrocarbons, ozone and the like through a series of physical and chemical reactions in the atmosphere after sunlight. Moreover, nitrogen oxides are also an important cause of acid rain formation, and are the most important cause of the generation of atmospheric ultrafine particulate matter (PM 2.5).
With the transformation of national energy structures and the upgrading of industries, governments have been vigorously spreading the use of clean energy such as natural gas. At the same time, the attention on the emission of air pollutants is also increased, wherein the standards for the allowable emission concentration of nitrogen oxides are more and more strict, and the strict emission standards of the air pollutants also promote the research and development of low-nitrogen combustion technology by manufacturers. However, the existing burner is difficult to meet the requirement of ultra-low emission. At present, the development of low-nitrogen burners is the most direct and effective solution to the emission of nitrogen oxides.
The low-nitrogen combustor is mainly divided into two types for controlling the emission of nitrogen oxides: the first is to control the generation of NOX and to narrow the distribution range of the high-temperature zone by lowering the temperature of the combustion high-temperature zone. The second type is a flue gas denitration technology, which treats NOX generated in flue gas. However, the tail treatment of the flue gas increases more equipment, and the consumption of consumable cost is continuously generated in the production process, so that the investment cost is high, and the economy is not good. At present, the technical update of the NOx control of the flue gas recirculation technology is particularly urgent.
Disclosure of Invention
In order to overcome the technical problems in the prior art, the invention aims to provide an adjustable circulating injection type low-nitrogen combustor which can exchange heat between air and flue gas, recover waste heat of the flue gas, preheat the air, improve combustion efficiency, reduce the temperature of flue gas emission and reduce fuel consumption.
The technical scheme adopted by the invention for solving the technical problems is as follows: an adjustable circulating injection type low-nitrogen combustor comprises a gas pipe, a combustion chamber arranged at the end of the gas pipe, an air pipe sleeved on the gas pipe and a flue gas pipe sleeved on the air pipe, wherein the air pipe is communicated with one end of the combustion chamber, the other end of the combustion chamber is communicated with the flue gas pipe, the gas pipe extends into the combustion chamber, the right end of the combustion chamber is communicated with the flue gas pipe, and the left end of the combustion chamber is provided with an air inlet;
the air pipe comprises an inner pipe and an outer pipe, the inner pipe and the outer pipe are sleeved together, the right end heads of the inner pipe and the outer pipe are communicated, the air flows from the outer pipe and reversely flows into the inner pipe, and the inner pipe is communicated with the combustion chamber through an air inlet;
the left end of the flue gas pipe is provided with a buffer ring which is vertical to the flue gas pipe, and the flue gas flows horizontally from the flue gas pipe and turns 90 degrees at the buffer ring; the outer wall of outer tube is equipped with one section neck, and this neck is located the cushion ring, be equipped with two at least injection holes on the neck, the cushion ring is penetrated the flue gas through injecting the hole and injecting to the outer intraductal injection.
Further preferred embodiments of the present invention are: the right end of the gas pipe is provided with a gas nozzle which extends into the combustion chamber,
further preferred embodiments of the present invention are: and an ignition device is arranged in the combustion chamber.
Further preferred embodiments of the present invention are: the diameter of the combustion chamber is larger than that of the gas pipe, and the diameter of the combustion chamber is smaller than that of the inner pipe.
Further preferred embodiments of the present invention are: the injection holes are arranged in two circles in the longitudinal direction of the outer pipe, a plurality of injection holes are arranged in the transverse direction of the outer pipe, and the plurality of injection holes are arranged at intervals to form a ring; the four valve clacks form a ring shape in the transverse direction, the length of the four valve clacks in the longitudinal direction is required to cover two circles of injection holes, lengthened bolts are installed at the centers of the four valve clacks, the outer ends of the lengthened bolts penetrate through the buffer ring and are fixed by nuts, and the four valve clacks open or close the injection holes through rotation of the nuts.
Further preferred embodiments of the present invention are: two circles of the injection holes are arranged in the longitudinal direction, 32 injection holes are arranged in the transverse direction of the injection holes, and the 32 injection holes are encircled into a ring shape.
Further preferred embodiments of the present invention are: the radian of the four valve clacks is 60-90 degrees.
Further preferred embodiments of the present invention are: the diameter of the inner tube is 3/4 the diameter of the outer tube.
Further preferred embodiments of the present invention are: the length of the inner tube is located 1/2-3/4 of the length of the outer tube.
According to the invention, the drainage structures such as necking down and opening are arranged between the flue gas and the air pipe, so that the injection backflow of the flue gas is realized, the air and the flue gas are mixed to a greater extent, the oxygen content is reduced, and the stable combustion of flame is ensured while the emission of nitrogen oxides is reduced. The invention continuously opens holes in the air flowing direction, can play a multi-stage injection function, and leads the flue gas and the combustion air to be mixed more uniformly. According to the invention, air and flue gas are mixed, so that the air temperature is raised, the oxygen concentration is reduced, the combustion time in the combustion chamber can be prolonged, the temperature uniformity in the combustion chamber is greatly improved, the local high-temperature area is reduced, and the generation of nitrogen oxides is inhibited. The invention can adjust the smoke reflux quantity according to the actual requirements of equipment and different application scenes, realizes the optimal combustion effect and reduces the generation of nitrogen oxides to the maximum extent. The injection type device with spontaneous flue gas circulation is not only suitable for self-preheating burners, but also can be expanded to be applied to other preheating type burners.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic diagram of the overall structure of an adjustable circulating injection type low-nitrogen combustor according to the invention;
FIG. 2 is a schematic view of the valve flap opening configuration of the present invention;
FIG. 3 is a schematic view of the flap closure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments below.
As shown in fig. 1, the adjustable circulation injection type low-nitrogen burner in the embodiment includes a gas pipe 1, a combustion chamber 2 installed at an end of the gas pipe 1, an air pipe 3 sleeved on the gas pipe 1, and a flue gas pipe 4 sleeved on the air pipe 3. Specifically, a gas nozzle 11 is installed at the right end of the gas pipe 1, and the gas nozzle 11 is located in the combustion chamber 2.
The gas pipe 1 in this embodiment supplies gas into the combustion chamber, and an ignition device 21 is provided in the combustion chamber 2, and combustion in the combustion chamber 2 is realized by ignition. The diameter of combustion chamber 2 is greater than in this embodiment the diameter of gas pipe 1, the diameter of combustion chamber 2 is less than the diameter of air pipe 3, is convenient for leave the distance for the supply of air, flue gas.
In order to realize the combustion in the combustion chamber, the air tube 3 in this embodiment includes an inner tube 31 and an outer tube 32, the inner tube 31 and the outer tube 32 are sleeved together, the right ends of the inner tube 31 and the outer tube 32 are communicated, the inner tube 31 is sleeved on the gas tube 1, so that the air flows from the outer tube to the right and reversely into the inner tube 31, and the inner tube 31 is communicated with the combustion chamber through the air inlet 22. An air intake port 22 is provided at the left end of the combustion chamber to facilitate the intake of air.
Through the above description, the technical effects achieved are: air enters the combustion chamber through the outer pipe 32, the inner pipe 31 and the air inlet 22, the gas pipe 1 directly supplies gas to the combustion chamber, and normal operation of the combustion chamber is realized through the bidirectional supply.
The embodiment carries out unique design to flue gas pipe 4, outer tube etc. and realizes the recirculation of flue gas, realizes that the discharge capacity of oxynitrides reduces. The method comprises the following steps: the left end of the flue gas pipe 4 is provided with a buffer ring 5 which is vertical to the flue gas pipe 4. The flue gas flows horizontally from the flue gas pipe 4 and is turned 90 degrees at the buffer ring 5. In this embodiment, a neck 321 is provided on the outer wall of the outer tube 32, and the neck 321 is located in the buffer ring 5. The necking 321 is provided with a plurality of injection holes 6, and the buffer ring 5 injects smoke into the outer tube 32 through the injection holes 6.
As shown in fig. 1-3, the injection holes 6 are arranged in two circles in the longitudinal direction of the outer tube 32, 32 injection holes 6 are arranged in the transverse direction of the outer tube, and 32 injection holes surround into a ring at certain intervals. In order to realize the adjustment of the opening size of the injection hole, the four valve clacks 7 are arranged in the embodiment, the four valve clacks 7 form an annular shape in the transverse direction, and the length of the four valve clacks 7 in the longitudinal direction is required to cover two circles of injection holes. Furthermore, lengthened bolts 71 are installed at the centers of the four valve flaps 7, the outer ends of the lengthened bolts 71 penetrate through the buffer ring 5 and are fixed by nuts 72, and the four valve flaps 7 cover or are far away from the injection holes through rotation of the nuts 72. The arc of the four flaps 7 in this embodiment is 90. The valve clack 7 can open or close the injection hole through the adjustment of the bolt, and the purpose of adjusting the smoke injection flow is achieved.
The diameter of the inner pipe is 3/4 of the diameter of the outer pipe, so that the outer pipe can conveniently circulate at high speed, and the inner pipe stores the mixed gas of air and fuel gas so as to be supplied to the combustion chamber. The length of the inner tube 31 is 1/2 of the length of the outer tube 32 in this embodiment, which facilitates the storage and supply of the mixed gas.
In this embodiment, set up necking down 321 on the outer tube of air pipe 3, necking down 321 makes the outer tube clearance shrink, and the air flow in the outer tube that makes is pressurized and forms the throttle, and forms the low-pressure zone at necking down 321 rear air, leads to the flue gas to carry out the mixing through injection hole 6 backward flow to the outer tube in with the air. Along the air flow direction, two injection holes are longitudinally and continuously formed in the necking neck 321, the first injection hole is used for injecting and mixing the flue gas, the second injection hole is used for injecting and mixing the flue gas again, the mixture is mixed again, the injection strength is obviously improved, and the flue gas backflow amount is increased.
Simultaneously, this embodiment sets up 32 injection holes in the transverse direction, has two circles of injection holes in longitudinal direction, carries out the injection in the time of a plurality of directions to annular air current, and secondary draws in longitudinal direction and penetrates for air current and flue gas misce bene. And the rear end of the necking 321 is provided with a reducer diffuser, so that the flow speed is reduced, and the static pressure is increased. The resulting mixed air flow is directed through the outer tube of the air tube, diverted into the inner tube, and finally combusted with the combustion gases through the air intake 22. The mixing flue gas in the embodiment reduces the oxygen concentration in the air, and the mixing flue gas is combusted in the combustion chamber to avoid local high temperature and inhibit the generation of nitrogen oxides.
In order to adapt to different combustion conditions, the four valve clacks 7 are arranged at the injection holes 6 and can be respectively opened and closed through independent control of bolts, and the smoke injection amount can be adjusted in a wider range. Different flue gas mixing amounts are adjusted according to different combustion conditions, nitrogen oxides are reduced, and meanwhile flame is stabilized to achieve the best combustion effect.
The invention utilizes the flue gas injection device of the Venturi effect to inject the flue gas in multiple stages, combines the advantages of a flue gas recirculation technology and a preheating burner, realizes the self-preheating type burner self-generating flue gas recirculation function, effectively inhibits the generation of nitric oxide of the self-preheating type burner, and reduces the emission of the nitric oxide.
According to the flue gas backflow drainage device, the flue gas ejection strength is improved, the flue gas backflow amount is adjusted through the electromagnetic valve, so that preheated air and flue gas are mixed more efficiently, the combustion stability and the combustion efficiency are further improved, the problem of controlling the flue gas circulation rate in the flue gas circulation technology is solved, the local high temperature of a combustion area is reduced, the emission of nitrogen oxides is reduced, and meanwhile, a more stable flame combustion effect is achieved.
The special smoke injection structure formed by reforming the air pipe replaces a smoke injection device in the traditional smoke circulation, and can be applied to other preheating type burner structures in an expanded way.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (9)
1. The utility model provides an adjustable circulation injection type low NOx burner, includes the gas pipe, installs combustion chamber, suit on the gas pipe end and the flue gas pipe of suit on the air pipe, the air pipe with the one end of combustion chamber communicates with each other, the other end of combustion chamber with the flue gas pipe communicates with each other, the gas pipe stretches into in the combustion chamber, its characterized in that:
the right end head of the combustion chamber is communicated with a flue gas pipe, and the left end head of the combustion chamber is provided with an air inlet;
the air pipe comprises an inner pipe and an outer pipe, the inner pipe and the outer pipe are sleeved together, the right end heads of the inner pipe and the outer pipe are communicated, the air flows from the outer pipe and reversely flows into the inner pipe, and the inner pipe is communicated with the combustion chamber through an air inlet;
the left end of the flue gas pipe is provided with a buffer ring which is vertical to the flue gas pipe, and the flue gas flows horizontally from the flue gas pipe and turns 90 degrees at the buffer ring; the outer wall of outer tube is equipped with one section neck, and this neck is located the cushion ring, be equipped with two at least injection holes on the neck, the cushion ring is penetrated the flue gas through injecting the hole and injecting to the outer intraductal injection.
2. The adjustable circulation injection type low-nitrogen combustor according to claim 1, characterized in that: the right end of the gas pipe is provided with a gas nozzle which extends into the combustion chamber.
3. The adjustable circulation injection type low-nitrogen combustor according to claim 2, characterized in that: and an ignition device is arranged in the combustion chamber.
4. The adjustable circulation injection type low-nitrogen combustor according to claim 1, characterized in that: the diameter of the combustion chamber is larger than that of the gas pipe, and the diameter of the combustion chamber is smaller than that of the inner pipe.
5. The adjustable circulation injection type low-nitrogen combustor according to claim 1, characterized in that: the injection holes are arranged in two circles in the longitudinal direction of the outer pipe, a plurality of injection holes are arranged in the transverse direction of the outer pipe, and the plurality of injection holes are arranged at intervals to form a ring; the four valve clacks form a ring shape in the transverse direction, the length of the four valve clacks in the longitudinal direction is required to cover two circles of injection holes, lengthened bolts are installed at the centers of the four valve clacks, the outer ends of the lengthened bolts penetrate through the buffer ring and are fixed by nuts, and the four valve clacks open or close the injection holes through rotation of the nuts.
6. The adjustable circulating injection type low-nitrogen combustor according to claim 1 or 5, characterized in that: two circles of the injection holes are arranged in the longitudinal direction, 32 injection holes are arranged in the transverse direction of the injection holes, and the 32 injection holes are encircled into a ring shape.
7. The adjustable circulation injection type low-nitrogen combustor according to claim 5, characterized in that: the radian of the four valve clacks is 60-90 degrees.
8. The adjustable circulation injection type low-nitrogen combustor according to claim 1, characterized in that: the diameter of the inner tube is 3/4 the diameter of the outer tube.
9. The adjustable circulation injection type low-nitrogen combustor according to claim 8, characterized in that: the length of the inner tube is located 1/2-3/4 of the length of the outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911262747.3A CN110822429A (en) | 2019-12-11 | 2019-12-11 | Adjustable circulation injection type low-nitrogen combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911262747.3A CN110822429A (en) | 2019-12-11 | 2019-12-11 | Adjustable circulation injection type low-nitrogen combustor |
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|---|---|
| CN110822429A true CN110822429A (en) | 2020-02-21 |
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| CN201911262747.3A Pending CN110822429A (en) | 2019-12-11 | 2019-12-11 | Adjustable circulation injection type low-nitrogen combustor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4304549A (en) * | 1978-08-19 | 1981-12-08 | Ipsen Industries International Gesellschaft Mit Beschrankter Haftung | Recuperator burner for industrial furnaces |
| CN102434878A (en) * | 2011-09-09 | 2012-05-02 | 华中科技大学 | Three-layer secondary air low nitrogen oxide swirling burner |
| KR20130061167A (en) * | 2013-05-28 | 2013-06-10 | 주식회사 수국 | Low nitrogen oxide burner |
| KR20170041299A (en) * | 2015-10-06 | 2017-04-17 | 한국생산기술연구원 | Ultra-low NOx burner through internal recirculation of combustion gas and multi-fuel operation |
| CN211345303U (en) * | 2019-12-11 | 2020-08-25 | 青岛新力通热工科技有限公司 | Adjustable circulation injection type low-nitrogen combustor |
-
2019
- 2019-12-11 CN CN201911262747.3A patent/CN110822429A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4304549A (en) * | 1978-08-19 | 1981-12-08 | Ipsen Industries International Gesellschaft Mit Beschrankter Haftung | Recuperator burner for industrial furnaces |
| CN102434878A (en) * | 2011-09-09 | 2012-05-02 | 华中科技大学 | Three-layer secondary air low nitrogen oxide swirling burner |
| KR20130061167A (en) * | 2013-05-28 | 2013-06-10 | 주식회사 수국 | Low nitrogen oxide burner |
| KR20170041299A (en) * | 2015-10-06 | 2017-04-17 | 한국생산기술연구원 | Ultra-low NOx burner through internal recirculation of combustion gas and multi-fuel operation |
| CN211345303U (en) * | 2019-12-11 | 2020-08-25 | 青岛新力通热工科技有限公司 | Adjustable circulation injection type low-nitrogen combustor |
Non-Patent Citations (1)
| Title |
|---|
| 胡道和: "水泥工业热工设备", vol. 1, 31 December 1992, 武汉工业大学出版社, pages: 15 * |
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